Fume collecting and removing apparatus



June 2, 1925.

E.L.TRUXAL FUME COLLECTING AND REMOVING APPARATUS 2 Sheets-Sheet 1 FiledJuly 19, 1923 [were for: fan 4E0 1. 257/144,

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June 2, 1925. 1,539,973

E. L. TRUXAL FUME COLLECTING AND REMOVING APPARATUS Filed July 1923 2Sheets-Sheet 2 fiwenwr: $144460 1 76 02744 W72 asses Patented June 2,1925. I

UNITED STATES A 1,539,973 PATENT OFFICE.

EDWARD I. TRUXAL, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO THE AMER-I-CAN STEEL AND -WIRE COMPANY OF NEW CORPORATION OF NEW'JEESEY.

JERSEY, OF HOBOKEN, JERSEY, A

' FUME COLLECTING AND REMOVING APrARATUs.

Application filed July 19,

To all whom 2'1- may concern:

Be it known that I, EDWARD L. TRUXAL, a citizen of the United States,and resident of \Vilkinsburg, in the county of Allegheny and State ofPennsylvania,,have invented certain new and useful Improvements in FumeCollecting and Removing Apparatus, of which the following is aspecification.

This invention relates to a method of and apparatus for removing fumesand vapors arising from vats, and while not n of apparatus having thenovel combination and construction of parts hereinafter de: scribed andillustrated in the accompanying drawings, in which Figure 1 is a planshowing, a pickling vat having fume collecting and removing-apparatusembodying my invention, and adapted for use in carrying out the methodforming part of the invention, 1

Figure 2 is a. sectional elevation, on a larger scale, taken on theirregular line II II of Figure 'l.

Referring more particularly to the drawings, the numeral 2 designatesthe vat as a whole, which is divided into three sections by walls 2and.2.v The vat shown is of curved formation. However, it will beunderstood that it maybe made straight if desired, and that each sectionmay be made separate from the other if desired without interfering withthe operation of my invention. The vat 2 is adapted to contain an acidsolution for removing the scale, or otherwise treating metal articlessuch as the bundles of rods 3 which are carried'on the holder 1. (SeeFigure 2).

The forward side wall 5 of-the vat 2 is provided with a pluralityof fiatnozzles 6 arranged side by side along its top in abutting relation witheach other. The inside 1923. Serial No. 652,658.

edge of each of the nozzles 6 is provided with a comparatively narrowelongated discharge .slot 7, the slots of the several nozzles formingsubstantially a continuous air discharge port around the forward side ofthe int. The nozzles project rearwardly beyond the sidewall f the vatand are provided with 'an inlet port,8 which is connected with a conduit9 leading from a blast main 10. The conduit 9 is provided with a valve11 for controlling the flow of air therethrough, and the main 10 extendsaround the vat 2 end is connected to a suitable power blower or. fan 12.

The rear side wall 14 of the vat 2 is provided along its upper edge witha plurality of exhausting traphoods 15 arranged side by side in abuttingrelation witheach other.

The hoods 15 have an open forward side 16 and, due totheir abuttingarrangement, form a substantially continuous trap around the vat. Eachof the hoods 15 is provided with an upwardly and rearwardly inclined topwall 17 and an upwardly an rearwardly curved bottom wall 18 whichextends upwardly to within a short distance of the top wall 17, therebyforming a narrow outlet port 19 which opens into a conduit portion 20.Suitable flat side Walls 21 and 22 serve to complete the hood andsupport the top and bottom walls.

The conduit portion 20 extends downwardly and connects at its lower endwith a suitable exhaust main or tunnel 24; which extends along thelength of the tank and is connected to a suitable standard exhaust fan25. A In carrying out my improved method, the blower 12 is started and ablast of air is blown through the main 10, conduits 9 and nozzles 6,from which it is discharged through the outlets 7 forming a practicallycontinuous blast blanket across the vat 2. Simultaneously with thestarting of the blower 12, the exhaust fan 25 started to cause a suctionin the main or tunnel 24-, conduit 20 and hoods 15,-which due totheirarrangement form a substantially continuous suction or trapping areaaround the entire rear side of the vat. v

v The acid solution in the vat 2 is generally heated when used and anyfumes or vapors arising from the vat are caught by the blast from thenozzles 6and blown over and into the trapping hoods 15. The vapors andfumes arising from the vat are much lighter than air and have a tendencyto rise, but due to the velocity of the air from the nozzles 6 they areheld down, but as soon as-they enter the trapping hoods they have atendency to rise. However, since the outlet ports 19 of the trappinghoods 15 are at the upper point thereof the fumes and vapors are caughtby the exhaust and drawn down through the conduit 20 and tunnel or main24 by the exhaust fan 25, and

thence blown out through a suitable stack (not shown) at a point distantfrom the vat. While I have shown and described only one specificembodiment of my invention, it will be expressly understood that Ido notWish to be limited thereto, since various modifications in both theapparatus and method may be made without departing from the scope of theappended claims.

:I cla-im:. g 1. The method of catching and removing fumes and vaporsarising'from an open top'treatiilg vat, which consists in directing ablast of air across the entire area of the vat so as to blow the fumesand vaporsto;

one side of the vat, and trapping the fumes and vapors atthe oppositeside of the vat from which the air is directed.

2. The method of catching and removing fumes and vapors arising from anopen top treating vat, which consists in direot ing a blast of airacross the vat so as to blow the fumes and vapors to one side of thevat, trapping thefnmes and vapors at the opposite side of the vat fromwhich the air is directed, and exhausting said trapped fumes and vapors.

- 3. The method of catching and removing fumes and vapors arising fro-ma treating vat, which consists in directing a blast of air across theentire area of the vat so as to blow the fumes and vapors to one side ofthe. vat, trapping the fumes and vapors along the opposite side of thevat from which the air is directed, and forcibly exhausting said trappedfumes and vapors.

, 4. The combination with an open top treating vat, of means fordirecting a blast of air from one side of saidvat across to the oppositeside, and exhausting means ar ranged along the side of said vat oppositesaid first named means, said blast of air being adapted. to drive fumesand vapors I arising from said vat into said exhausting means.

5. The combination with a treating vat,

of means for directing a blast of air from one side of said vat, acrosssubstantially the entire area thereof, to the opposite side so as toblow all fumes and vapors arising from said vat to said opposite side,means arranged along the side of said vat opposite said first narnedmeans for trapping the fumes and vapors, and means for exhausting saidfumes and vapors from said trapping means.

6. The combination with a treating vat for treating metal and containingan acid solution, of means for directing a continuous blast of air fromone side of said vat,

across substantially the entire area thereof, 'to the opposite side soas to blow all the fumes and vapors arising from said vat tosaid'opposite side, means arranged along the side of said vat oppositesaid first named means for trapping the fumes and vapors, r

and means for continually exhausting said trapped fumes and vapors.

7. The eombinationwith a treating vat for treating metal containing anacid solu tion, of a plurality of blast nozzles arranged along the oneside wall of said vat, means for directing air under pressure through'said' nozzles, said nozzles being adapted to direct the air over saidvat so as to blow all fumes and vapors across said vat to the sideopposite from said nozzles, and a plurality of trapping hoods arrangedalong the side wall-of said vat opposite from said nozzles and adaptedto trap the fumes and vapors blown over by the air from said nozzles. Y

8. The combination with a treating vat for treating metal containing anacid solution, of a plurality ofblast nozzles arranged along the onesidewall of said vat, means "for directing air under pressure throughslightly below said-top wall forming an outlet, and means communicatingwith said outlet for exhausting the fumes and vapors from said hoods.

In' testimony. whereof I have hereunto set my hand.

' EDWARD L. TRUXAL.

